Adjustable bearing for power-transmission mechanism.



T. H. BLAIR.

ADJUSTABLE BEARING FOR POWER TRANSMISSION MECHANISM. I

APPLICATION FILED SEPT. II, I913.

Llfififififl, Y PatentedSept. 14, 1915.

MW IN line 33, of Fig. 1'.

THOMAS HJBLAIR, OF NORTHBORO, MASSACHUSETTS.

. Specification of Letters Patent.

Patented Sept. Ml, 11915.

Application filed September 11, 1913. Serial No. 789,270.

To all whom it may concern: I

Be it known that I, THOMAS H. BLAIR, a citizen of the United States, residing at Northboro, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Adjustable Bearings for Power-Transmission Mechanism, of which the following, together with the accompanying drawing, is a specification.

.My invention relates to power transmission mechanism and has particular reference to such mechanism in those instances where adjustment of the distance between a shaft anpl other cooperating mechanism is desirab e.

An object of the invention is to provide a driving and a driven shaft with means whereby the distance between them may be easily, quickly and accurately adjusted, in order to insure proper action of the mechanism connecting the two shafts.

Another object of the invention is to provide an improved means for pivotally supporting the end of a shaft which is adjustable transversely of its axis.

Other objects and advantages will appear from the following description taken in connection with the accompanying drawing.

The principle of my invention will be explained by describing one embodiment thereof in connection with a moving picture machine as shown in the drawing. Tt'is obviou's, however, that the principle of the invention may be applied in other forms of machines and apparatus.

In the drawing, Figure 1 is a horizontal sectional view on the line 11 of Fig. 2, showing a portion of a moving picture machine, 11180112111811) for feeding strips of film being shown as constructed in accordance with my invention. Fig. 2 is a vertical sectional view on the -line 22, of Fig. 1.-

Fig. 3 is a vertical sectional view on the Fig. 4 is a vertical sectional view on the line 44, of'Fig. 1.

Fig. 5 is an edge view of the driving ele ment in the Geneva stop -motion"sliown in Figs. 1 and' l aportion being broken away to show detaiis.

parts in the different figures. v

The framework of the machine supports a driving shaft 2 in suitablebearings, "this shaft carrying a rigidly attached driving,

pulley 3Jon'which a belt may run. Any desired means for rotating the shaft 2' might of course be substituted for the pulley 3.

Parallel to the shaft 2 and supported also by'the framework is a cylindrical sleeve 4 carrying bearings 5 and 6 in which turns a driven shaft 7. The two shafts 2 and 7 are operatively connected by a Geneva stop mot1on comprising the driving element 8 attached to the shaft 2 and the driven element 9 attached to the shaft 7. The driving pins 10 are carried loosely in holes in the body portion of the driving element 8 so that they may turn therein to reduce friction when they engage the star wheel 11 of the driven element. The outer ends of the pins 10-are pivotally supported in suitable holes in a plate 12 and longitudinal movement of the pins in their bearings is prevented by screws 13 which loosely engage grooves in the pins as shown in Fig. 5. As is usual in this class of machines, the driven shaft 7 is provided with a pair of film feeding wheels 14 having small projections or teeth 15 on their peripheries to insure positive engagement with the perforated edges of the film.

In order to secure satisfactory results in the operation of a moving picture machine,

it is of course essential that the position of. each image on. the film as the light passesv through it be as nearly as possible identical plished by means for delicately but effectively adjusting the distance between the driving and driven shafts so that the concave edges of the teeth of the star wheel 11 will be held accurately against. the holding surfaces 16 of the driving element 8 when engaged thereby. I

The bearings 5 and 6 support the driven shaft 7 eccentrically with respect to the I sleeve 4 and this sleeve is provided with Like reference characters indicatesimilar spanner holes 17. The sleeves 4 mayv therefore be turned on its axis to carry the driven shaft 7 and the star wheel 11 either toward or away from the, driving shaft 2 for the purpose;.alreadyf findicated. The screw 18 acts n-a'djustable stop for the end of-the hollow cylinder 21 in'the other end of which line with the shaft and its sleeve, said supis fixed a hollow ring 22' which provides an interior shoulder to be engaged by the head I of a bolt 23; The-bolt '23 is carried axially in a sleeve or support 24 mounted in'the I frame, this sleeve 24 being in aliner'nent'with the sleeve 4 and beingprovided so that the shaft 7, sleeve 4 and parts carried thereby may be placed in and removed from the and the film feeding Wheels 14 with their teeth 15 are at least as small as the sleeves 4 port being as large as the sleeve, whereby the shaft and its sleeve may be removed longitudinally. I

2. In a power transmimion mechanism a shaft, a bearing for one end of the shaft, a ring rigidly connected to said bearing with its axis in line with the shaft, a bolt extending through said ring, and a support receiving said bolt, whereby said bolt secures the bearing to the support.

3. In a power transmission mechanism a shaft, a bearing for one end of said shaft, a ring in line with said shaft and fixed to the bearing. a bolt passing through said ring with its shank smaller than the opening in thering, and a support receiving the bolt,

whereby the bolt secures the bearing adjustably to the support.

frame of the machine. The star Wheel 11 the shaft transversely of its axis, a bearingand 24, sothat theymay be withdrawn with said sleevesi and with the shaft 7 from the Q 1 frame ofgthe machine. And the edge of the "sleeve 24 25. The opening in t he ring 22 is of course considerably larger'than the shank,- 0f the f position isbe'ing adjusted; Then-after the bolt 23 is tightened byl, turningthenut 26 to hold: b a 20 fi 'ln upport fortheshaftg -isjdesirable in theop a p cture and othermachine's that vthey,run-as q uiegy. f possible. with :this end in: view, t 9? tain. changes maybe made without'depart o 1 gfrom the. spirit etake-invention, but What Iclaim a's new and desire to secure .3. Le e jlate ifl 's 111apower transmissionmechanlsm,a

shaft,

rin in: the machine frame in the shaft- 7; as the shaft is moved 'longitudis "nallyout ofthe frame of the machine. The is heldin position by 'a set screw :fljplate 12 is cut away except at'th'ose points smaller than the h'e'ad'bf the bolt 23'but a is forsupporting said bearing to permit its;

7 bolt so that'when-the bolt is bo s the bear- [ing 20 may-move with the'shaft 7 while its.

port.

4. Ina power transmission mechanism a shaft, means for adjusting the position of for one end of said shaft, a ring in line with. said shaft and fixed to the bearing, a bolt passing through said ring with its shank smaller thanthe opening in the ring, and a support receiving the bolt, whereby the bolt secures the bearing adjustably to the sup- In apowe r transmission mechanism a shaft adjustable in a circular path, a bearing carried. by one end of said shaft, means movementwith the shaft as the latter is adjusted, and means for securing said bear ng to hold the shaft in adjusted position.

. position of the shaft 7' has'flbeen adjusted,the j In a power transmission mechanism a shaft, means for adjusting one end of said shaft .in any direction transversely of the axis of said shaft, a bearing for theother .e'n'dof said shaft movable therewith to corno of moving respond to its var ous positions-of adjustmentpand means for securlng. said bearing in adjusted position.

eneva-stop motion is inclosed in a box I v I j s av ng a; cover. 28', the box and tscover ingma'de of'ileadjor'othertnon resilient- 72' In a power transmission mechanism a shaftadjustable transversely ofits axis, a hearing for the-shaft movable in any direction in a plane transverse to the axis of the shaft so a's-to be carried with the shaft while 1 thejposition of the shaft is being. adjusted,

and-means for securing the bearing in adflu ed position.

8. In a, machine, ashaft, a member carried by the shaft, a bearing for oneend of the shaft, a support, and means for adjustably securing the bearing tothe support,

the support being in line with the shaft and ias large as the bearing and the'member carbe removed from.

ried'by the shaft, whereby the said parts may the machine longitudi- 9. The combination witli a. supporting for-adjustingone end of said shaft transversely of the axis thereof, and a bearing frame. of a shaft journaled therein, means I for the other end of the shaft movable thereand means for securing said second bearing with as said shaft is adjusted, said bearing in adjusted position. 10

being independent of said adjusting means. Dated this third day of September, 1913'. 10. The combination with a shaft, of a THOMAS H BLAIR supporting bearing therefor, means for adjusting said bearing to change the position Witnesses:

of the shaft, a second bearing for said shaft RUFUS B. FOWLER,

movable therewith as the same is adjusted, PENELOPE OOMBERBAOH. 

